i'm wolf blitzer. you're in "the situation room." >>> we're following the fighting between israel and hamas. the two sides trading rocket and missile fire with deadly results. let's take you now to the cnn center for the very latest. >> all right, wolf, thank you very much. israeli troops are amassing on the border, waiting for the world to shoulder their weapons and cross into gaza. for people in both gaza and israel, this war is well under way. that is what this war sounds like in israel. wailing sirens warning an hamas ha rocket is only seconds away. this is video from the israeli defense force, a missile hitting a home of a hamas leader. they're proof that the exploesers are stored in buildings. spearheading talks aimed at ending the violence. it's impossible to know how this will play out. just remember that four years ago, the last time israel invaded gaza, 13 israelis were killed while 1400 palestinians died. ben wedeman joins me. does it look like we're about to witness a ground war here? >> we